VOL-5176: Purge 2.8 jobs

This also includes moving several jobs back to their original build
agent, since build agent issues have been fixed.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I2adfc8a65dfa7cacb80a59fc418cb3b00a7e5ffe
diff --git a/tox.ini b/tox.ini
index 8bbd5c0..ea73c54 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,12 @@
 commands =
     jenkins-jobs {posargs:--help}
 
+[testenv:jjb-test]
+deps =
+    jenkins-job-builder=={env:JJB_VERSION:6.4.1}
+commands =
+    jenkins-jobs --conf {env:JJB_CONF:jenkins.ini} {posargs} test -o /tmp jjb/
+
 [testenv:pre-commit-install]
 basepython = python3
 deps = pre-commit